Combustion-engine.



H. J. ALVIS.

COMBUSTION ENGINE.

APPLICATION HLED JAN-11,1913.

1,189,187. Pat ented June 27,1916.

2 SHEETSSHEET I.

7 0 v I a HARRY J. aLvIs. or EAST sr'. Louis, ILLINOIS.

COMBUSTION-ENGINE.

- Specificationof Letters Patent.

Patented June 27, 1916.

Application filed January 11, 1913. Serial No; 741,464.

To aZZ whom it may concern:

Be it known that I, HAizRv J. ALvI s, a

' citizen of the United States", .residin at East. St. Louis, inthegcounty of St. (/lair and State of Illinois, have invented a certainnew and useful Improvement in -Oombust-ion-Engines, of which thefollowing is a specification.

My invention relates to improvements in internal combustion engines andis .illustrated diagrammatically in one form in the accompanyingdrawlngs, wherein Figure l is a side elevation partly in section alongline 11 of Figs. 2, 3 and 4; Fig. 2, a section along the line 22 ofFigs. 1 and 3-; Fig.3 is an end elevation in part section; Fig. 4, asectional view along the line 4-4 of Figs. 1 and 3; Fig. 5, a plan viewof the sleeve valve; Fig. 6,'an elevati'on .partly in section along theline 66 of Fig. 5; Fig. 7 is a detail sectional view through one of thecylinders; Fig. 8 is a section along the line 88 of Figs. 2 and 4t.

Like parts are indicated by like letters throughout the several figures.

A is a cylinder wall, A the crank case, A a valve gear housing. Thishousin is in the present instance cast integral with the cylinder wallin part and in part with .the crank case but it is quite evident that itmay be made separately if so desired andbolted or riveted in place asthe case may be.

B is a crank shaft provided with connecting rods B and pistons B Thecarbureter G discharges into a Y-shaped manifold C which in turncommunicates with intake headers or manifolds C G'.

C C are exhaust headers or manifolds which discharge through a'commonexhaust pipe C I The cylinder A is of greater inside diameter' than thepiston B and contains a sleeve S which functions as a sleeve valve andis provided about its lower edge with the spiral gear S in mesh with aworm S on the shaft S which shaft is driven from the crankshaft B byasilent chain S passing over the gear S on the shaft S and the gear S onthe crank shaft B. The sleeve S projects upwardly above the upward limitof the piston travel and forms the wall of the combustion chamber sinceit terminates only at the top of the cylinder. The upper portion of thissleeve is provided with ports S 'S The passages P P P P lead from thecombustion chamber through the cylinderwallto theintake manifolds C Crespectively. The passages P P and P P are arranged diametricallyopposed with reipeci to the cylinder. The passages P P lead from theexhaust manifolds C C re pectively to the combustion chamber and arealso diametrically opposed'in pairs with respect to the cylinder.

It will be evident that while I have shown In my drawmgs an operativedevice, still many changes mlght be made both'in size,

shape and arrangement of parts without de-, parting materially from thespirit of my invention and I wishtherefore that my draw- Ings beregarded as 1n a sense diagrammatic.

The ,PF g Q Q have at their lower extremitles the exhaust ports Q? Qcontrolled by the sleeve S and adapted to be opened when the slots Q Qin the sleeve are in line with the ports. The passages Q communicatewith the exhaust manifolds C C respectively.

-The use and operation of-my invention are as follows :Assuming thepiston. as shown in the cylinder on the right hand side of Fig. 1 to beat the lower extremity of its travel, the. valve sleeve as it rotates inthe direction indicated by the arrow will commence to open the exhaustports and, as

the shaft continues its rotation, the ports will continue to open andthe piston move upwardly in the cylinder expelling the burnt gases. Asthe piston approaches the endof its stroke the sleeve will-have rotatedto such a point as to commence to close the exhaust ports and open theintake ports and as the piston commences its downward or suctionstroke'it will draw a charge of combustible gas from the carbureterthrough the intake manifolds and intake ports into the cylinder theports being meanwhile wide open. mences its upward or compression strokethe ports will be closed by the forward rotation of the sleeve and thepiston will complete its upward movement for the compression stroke. Thecharge will be fired in any suitable and usual manner. -The piston willagain continue on its working stroke returning to the relative positionshown in Fig. 1 upon the right hand side with the exception that thesleeve will have made only a single one-half revolution and the port inthe sleeve that was on the right hand side of the engine will now befound on the left side of the engine and viceversa.

However, as the piston again com-- It will be evident that a difierentnumber of ports might be used by varying the relative speed of thesleeve and the engine being ported, intake and exhaust passages Withinthe cylinder walls diametrically opposed and communicating respectivelywith the adjacent intake and exhaust pipes, the passage being controlledby the ported sleeve and being so arranged that as the ported sleeverotates, it opens first the intake and then the exhaust passages, theports in the cylinder being, adapted 'to operate first as intake andthen as exhaust ports, and being arranged separate one from the other bysubstantially an angle of 180.

In testimony whereof, I afiix my signature in the presence oftwo-Witnesses this 23rd day of December 1912.

HARRY J. ALVIS.

\Vitnesses S. G. Coon, Gno. KRONMILLER.

